The American Mathematical Society administers several travel grant programs, some funded by donations to the AMS, others by outside funding from sources such as the National Science Foundation (NSF). Most of these programs provide partial travel support.
Please see the individual program pages for more information about each type of grant, including deadlines, eligibility, and restrictions.
Questions about travel grants can be directed to the AMS Professional Programs Department at 401-455-4096 (800-321-4267, ext. 4096, in the U.S. and Canada).